DAIKOWT 2Ni

GTAW
  • CRYOGENIC STEELS
2Ni

Description

Welding rod for 2% Ni steels
Solid rod designed for welding low-alloy steels for low-temperature applications. Generally, they are used for welding 2.5% nickel steels and other materials that require good toughness at temperatures down to -60 °C.
Specifications
EN ISO 14341-A
W 50 6 M21 2Ni2
AWS A5.28
ER80S-Ni2
Shielding
I1
Positions
PA, PB, PC, PD, PE, PF
Current
DC-
Packaging Type
5kg carton tube
Asme qualifications
F-No (QW432)
6
A-No (QW442)
10
Chem. Comp. %
0
C
0.09
Mn
1.1
Ni
2.3
P
0.01
S
0.01
Mo
0.03
Si
0.55
Cu
0.12
Mechanical Properties
min
variant
Tensile strength Rm MPa
550
590
Yield strength Rp0.2 MPa
500
520
Elongation A (L0=5d0) %
24
25
Impact Charpy ISO-V
47J @ -60°C
50J @ -60°C
Impact Charpy ISO-V
-
-
Welding Parameters
1.6 mm
2.4 mm
Ampere
95A - 135A
145A - 205A
Voltage
-
-
Packaging
Ø 1,2÷3,2mm
Ø 1,2÷3,2mm
Packaging Type
product.packaging_types.product.packaging_types.product.packaging_types.5kg carton tube
product.packaging_types.product.packaging_types.product.packaging_types.5kg carton tube
2Ni
Description

Application

Ideal for the production of storage tanks, process plants, and related piping, this product guarantees excellent fracture toughness properties in welded joints at temperatures down to -60 °C. The inclusion of approximately 2.5% Ni enables microstructural refinement and improves tolerance against procedural variations compared to unalloyed C-Mn weld metals. Additionally, it promotes the formation of a stable patina, essential for maintaining the characteristics of weather-resistant steels, thus representing a valid alternative to the use of corresponding consumables. Preheating should be performed according to the base material and its thickness. While AWS specifications for consumables require post-weld heat treatment (PWHT), many applications can be left in the as-welded condition. The need for PWHT is usually determined by the applicable design codes.

Alloy Type

Nominally 2.5%Ni low alloy steels.

Microstructure

In the as-welded condition the microstructure is ferritic with a component of acicular ferrite for optimum toughness.

Materials

Low temperature applications, fine-grained steels that contain up to 2.5% Nickel.
  • ASTM: A203 gr. A & B plate, A333 gr. 6 pipe, A350 gr. LF1 & LF2 forgings, A352 gr. LC2 casting
  • API: 5L X52, 5L X56, 5L X60, 5L X65

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